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![Lv Zheng](/assets/img/avatar_default.png)
It is reported by kernel build test systems that all ACPICA source files in the kernel tree have incorrect label indentation. This patch changes default indent option used in the release process to fix this bug. Lv Zheng. Signed-off-by: Lv Zheng <lv.zheng@intel.com> Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
744 lines
20 KiB
C
744 lines
20 KiB
C
/*******************************************************************************
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*
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* Module Name: utdelete - object deletion and reference count utilities
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*
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******************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acinterp.h"
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#include "acnamesp.h"
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#include "acevents.h"
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#define _COMPONENT ACPI_UTILITIES
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ACPI_MODULE_NAME("utdelete")
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/* Local prototypes */
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static void acpi_ut_delete_internal_obj(union acpi_operand_object *object);
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static void
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acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_internal_obj
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*
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* PARAMETERS: object - Object to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: Low level object deletion, after reference counts have been
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* updated (All reference counts, including sub-objects!)
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*
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******************************************************************************/
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static void acpi_ut_delete_internal_obj(union acpi_operand_object *object)
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{
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void *obj_pointer = NULL;
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union acpi_operand_object *handler_desc;
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union acpi_operand_object *second_desc;
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union acpi_operand_object *next_desc;
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union acpi_operand_object **last_obj_ptr;
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ACPI_FUNCTION_TRACE_PTR(ut_delete_internal_obj, object);
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if (!object) {
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return_VOID;
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}
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/*
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* Must delete or free any pointers within the object that are not
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* actual ACPI objects (for example, a raw buffer pointer).
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*/
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switch (object->common.type) {
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case ACPI_TYPE_STRING:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"**** String %p, ptr %p\n", object,
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object->string.pointer));
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/* Free the actual string buffer */
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if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
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/* But only if it is NOT a pointer into an ACPI table */
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obj_pointer = object->string.pointer;
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}
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break;
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case ACPI_TYPE_BUFFER:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"**** Buffer %p, ptr %p\n", object,
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object->buffer.pointer));
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/* Free the actual buffer */
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if (!(object->common.flags & AOPOBJ_STATIC_POINTER)) {
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/* But only if it is NOT a pointer into an ACPI table */
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obj_pointer = object->buffer.pointer;
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}
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break;
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case ACPI_TYPE_PACKAGE:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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" **** Package of count %X\n",
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object->package.count));
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/*
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* Elements of the package are not handled here, they are deleted
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* separately
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*/
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/* Free the (variable length) element pointer array */
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obj_pointer = object->package.elements;
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break;
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/*
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* These objects have a possible list of notify handlers.
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* Device object also may have a GPE block.
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*/
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case ACPI_TYPE_DEVICE:
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if (object->device.gpe_block) {
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(void)acpi_ev_delete_gpe_block(object->device.
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gpe_block);
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}
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/*lint -fallthrough */
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_THERMAL:
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/* Walk the address handler list for this object */
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handler_desc = object->common_notify.handler;
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while (handler_desc) {
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next_desc = handler_desc->address_space.next;
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acpi_ut_remove_reference(handler_desc);
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handler_desc = next_desc;
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}
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break;
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case ACPI_TYPE_MUTEX:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Mutex %p, OS Mutex %p\n",
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object, object->mutex.os_mutex));
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if (object == acpi_gbl_global_lock_mutex) {
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/* Global Lock has extra semaphore */
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(void)
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acpi_os_delete_semaphore
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(acpi_gbl_global_lock_semaphore);
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acpi_gbl_global_lock_semaphore = NULL;
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acpi_os_delete_mutex(object->mutex.os_mutex);
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acpi_gbl_global_lock_mutex = NULL;
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} else {
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acpi_ex_unlink_mutex(object);
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acpi_os_delete_mutex(object->mutex.os_mutex);
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}
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break;
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case ACPI_TYPE_EVENT:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Event %p, OS Semaphore %p\n",
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object, object->event.os_semaphore));
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(void)acpi_os_delete_semaphore(object->event.os_semaphore);
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object->event.os_semaphore = NULL;
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break;
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case ACPI_TYPE_METHOD:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Method %p\n", object));
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/* Delete the method mutex if it exists */
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if (object->method.mutex) {
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acpi_os_delete_mutex(object->method.mutex->mutex.
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os_mutex);
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acpi_ut_delete_object_desc(object->method.mutex);
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object->method.mutex = NULL;
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}
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break;
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case ACPI_TYPE_REGION:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Region %p\n", object));
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/*
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* Update address_range list. However, only permanent regions
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* are installed in this list. (Not created within a method)
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*/
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if (!(object->region.node->flags & ANOBJ_TEMPORARY)) {
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acpi_ut_remove_address_range(object->region.space_id,
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object->region.node);
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}
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second_desc = acpi_ns_get_secondary_object(object);
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if (second_desc) {
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/*
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* Free the region_context if and only if the handler is one of the
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* default handlers -- and therefore, we created the context object
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* locally, it was not created by an external caller.
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*/
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handler_desc = object->region.handler;
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if (handler_desc) {
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next_desc =
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handler_desc->address_space.region_list;
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last_obj_ptr =
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&handler_desc->address_space.region_list;
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/* Remove the region object from the handler's list */
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while (next_desc) {
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if (next_desc == object) {
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*last_obj_ptr =
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next_desc->region.next;
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break;
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}
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/* Walk the linked list of handler */
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last_obj_ptr = &next_desc->region.next;
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next_desc = next_desc->region.next;
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}
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if (handler_desc->address_space.handler_flags &
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ACPI_ADDR_HANDLER_DEFAULT_INSTALLED) {
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/* Deactivate region and free region context */
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if (handler_desc->address_space.setup) {
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(void)handler_desc->
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address_space.setup(object,
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ACPI_REGION_DEACTIVATE,
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handler_desc->
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address_space.
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context,
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&second_desc->
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extra.
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region_context);
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}
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}
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acpi_ut_remove_reference(handler_desc);
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}
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/* Now we can free the Extra object */
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acpi_ut_delete_object_desc(second_desc);
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}
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break;
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case ACPI_TYPE_BUFFER_FIELD:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Buffer Field %p\n", object));
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second_desc = acpi_ns_get_secondary_object(object);
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if (second_desc) {
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acpi_ut_delete_object_desc(second_desc);
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}
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break;
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case ACPI_TYPE_LOCAL_BANK_FIELD:
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"***** Bank Field %p\n", object));
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second_desc = acpi_ns_get_secondary_object(object);
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if (second_desc) {
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acpi_ut_delete_object_desc(second_desc);
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}
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break;
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default:
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break;
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}
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/* Free any allocated memory (pointer within the object) found above */
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if (obj_pointer) {
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"Deleting Object Subptr %p\n", obj_pointer));
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ACPI_FREE(obj_pointer);
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}
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/* Now the object can be safely deleted */
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS, "Deleting Object %p [%s]\n",
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object, acpi_ut_get_object_type_name(object)));
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acpi_ut_delete_object_desc(object);
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return_VOID;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_delete_internal_object_list
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*
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* PARAMETERS: obj_list - Pointer to the list to be deleted
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*
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* RETURN: None
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*
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* DESCRIPTION: This function deletes an internal object list, including both
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* simple objects and package objects
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*
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******************************************************************************/
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void acpi_ut_delete_internal_object_list(union acpi_operand_object **obj_list)
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{
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union acpi_operand_object **internal_obj;
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ACPI_FUNCTION_ENTRY();
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/* Walk the null-terminated internal list */
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for (internal_obj = obj_list; *internal_obj; internal_obj++) {
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acpi_ut_remove_reference(*internal_obj);
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}
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/* Free the combined parameter pointer list and object array */
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ACPI_FREE(obj_list);
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return;
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_update_ref_count
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*
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* PARAMETERS: object - Object whose ref count is to be updated
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* action - What to do (REF_INCREMENT or REF_DECREMENT)
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*
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* RETURN: None. Sets new reference count within the object
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*
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* DESCRIPTION: Modify the reference count for an internal acpi object
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*
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******************************************************************************/
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static void
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acpi_ut_update_ref_count(union acpi_operand_object *object, u32 action)
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{
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u16 original_count;
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u16 new_count = 0;
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acpi_cpu_flags lock_flags;
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ACPI_FUNCTION_NAME(ut_update_ref_count);
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if (!object) {
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return;
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}
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/*
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* Always get the reference count lock. Note: Interpreter and/or
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* Namespace is not always locked when this function is called.
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*/
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lock_flags = acpi_os_acquire_lock(acpi_gbl_reference_count_lock);
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original_count = object->common.reference_count;
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/* Perform the reference count action (increment, decrement) */
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switch (action) {
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case REF_INCREMENT:
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new_count = original_count + 1;
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object->common.reference_count = new_count;
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acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
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/* The current reference count should never be zero here */
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if (!original_count) {
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ACPI_WARNING((AE_INFO,
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"Obj %p, Reference Count was zero before increment\n",
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object));
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}
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"Obj %p Type %.2X Refs %.2X [Incremented]\n",
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object, object->common.type, new_count));
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break;
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case REF_DECREMENT:
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/* The current reference count must be non-zero */
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if (original_count) {
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new_count = original_count - 1;
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object->common.reference_count = new_count;
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}
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acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
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if (!original_count) {
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ACPI_WARNING((AE_INFO,
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"Obj %p, Reference Count is already zero, cannot decrement\n",
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object));
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}
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"Obj %p Type %.2X Refs %.2X [Decremented]\n",
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object, object->common.type, new_count));
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/* Actually delete the object on a reference count of zero */
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if (new_count == 0) {
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acpi_ut_delete_internal_obj(object);
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}
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break;
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default:
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acpi_os_release_lock(acpi_gbl_reference_count_lock, lock_flags);
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ACPI_ERROR((AE_INFO, "Unknown Reference Count action (0x%X)",
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action));
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return;
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}
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/*
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* Sanity check the reference count, for debug purposes only.
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* (A deleted object will have a huge reference count)
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*/
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if (new_count > ACPI_MAX_REFERENCE_COUNT) {
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ACPI_WARNING((AE_INFO,
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"Large Reference Count (0x%X) in object %p, Type=0x%.2X",
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new_count, object, object->common.type));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ut_update_object_reference
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*
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* PARAMETERS: object - Increment ref count for this object
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* and all sub-objects
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* action - Either REF_INCREMENT or REF_DECREMENT
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*
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* RETURN: Status
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*
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* DESCRIPTION: Increment the object reference count
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*
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* Object references are incremented when:
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* 1) An object is attached to a Node (namespace object)
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* 2) An object is copied (all subobjects must be incremented)
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*
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* Object references are decremented when:
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* 1) An object is detached from an Node
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*
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******************************************************************************/
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acpi_status
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acpi_ut_update_object_reference(union acpi_operand_object *object, u16 action)
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{
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acpi_status status = AE_OK;
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union acpi_generic_state *state_list = NULL;
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union acpi_operand_object *next_object = NULL;
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union acpi_operand_object *prev_object;
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union acpi_generic_state *state;
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u32 i;
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ACPI_FUNCTION_NAME(ut_update_object_reference);
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while (object) {
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/* Make sure that this isn't a namespace handle */
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if (ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED) {
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ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
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"Object %p is NS handle\n", object));
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return (AE_OK);
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}
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/*
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* All sub-objects must have their reference count incremented also.
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* Different object types have different subobjects.
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*/
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switch (object->common.type) {
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case ACPI_TYPE_DEVICE:
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case ACPI_TYPE_PROCESSOR:
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case ACPI_TYPE_POWER:
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case ACPI_TYPE_THERMAL:
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/*
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* Update the notify objects for these types (if present)
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* Two lists, system and device notify handlers.
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*/
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for (i = 0; i < ACPI_NUM_NOTIFY_TYPES; i++) {
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prev_object =
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object->common_notify.notify_list[i];
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while (prev_object) {
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next_object =
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prev_object->notify.next[i];
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acpi_ut_update_ref_count(prev_object,
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action);
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prev_object = next_object;
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}
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}
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break;
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case ACPI_TYPE_PACKAGE:
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/*
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* We must update all the sub-objects of the package,
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* each of whom may have their own sub-objects.
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*/
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for (i = 0; i < object->package.count; i++) {
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/*
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* Null package elements are legal and can be simply
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* ignored.
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*/
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next_object = object->package.elements[i];
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if (!next_object) {
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continue;
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}
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switch (next_object->common.type) {
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case ACPI_TYPE_INTEGER:
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|
case ACPI_TYPE_STRING:
|
|
case ACPI_TYPE_BUFFER:
|
|
/*
|
|
* For these very simple sub-objects, we can just
|
|
* update the reference count here and continue.
|
|
* Greatly increases performance of this operation.
|
|
*/
|
|
acpi_ut_update_ref_count(next_object,
|
|
action);
|
|
break;
|
|
|
|
default:
|
|
/*
|
|
* For complex sub-objects, push them onto the stack
|
|
* for later processing (this eliminates recursion.)
|
|
*/
|
|
status =
|
|
acpi_ut_create_update_state_and_push
|
|
(next_object, action, &state_list);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error_exit;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
next_object = NULL;
|
|
break;
|
|
|
|
case ACPI_TYPE_BUFFER_FIELD:
|
|
|
|
next_object = object->buffer_field.buffer_obj;
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_REGION_FIELD:
|
|
|
|
next_object = object->field.region_obj;
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_BANK_FIELD:
|
|
|
|
next_object = object->bank_field.bank_obj;
|
|
status =
|
|
acpi_ut_create_update_state_and_push(object->
|
|
bank_field.
|
|
region_obj,
|
|
action,
|
|
&state_list);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error_exit;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_INDEX_FIELD:
|
|
|
|
next_object = object->index_field.index_obj;
|
|
status =
|
|
acpi_ut_create_update_state_and_push(object->
|
|
index_field.
|
|
data_obj,
|
|
action,
|
|
&state_list);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error_exit;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_LOCAL_REFERENCE:
|
|
/*
|
|
* The target of an Index (a package, string, or buffer) or a named
|
|
* reference must track changes to the ref count of the index or
|
|
* target object.
|
|
*/
|
|
if ((object->reference.class == ACPI_REFCLASS_INDEX) ||
|
|
(object->reference.class == ACPI_REFCLASS_NAME)) {
|
|
next_object = object->reference.object;
|
|
}
|
|
break;
|
|
|
|
case ACPI_TYPE_REGION:
|
|
default:
|
|
|
|
break; /* No subobjects for all other types */
|
|
}
|
|
|
|
/*
|
|
* Now we can update the count in the main object. This can only
|
|
* happen after we update the sub-objects in case this causes the
|
|
* main object to be deleted.
|
|
*/
|
|
acpi_ut_update_ref_count(object, action);
|
|
object = NULL;
|
|
|
|
/* Move on to the next object to be updated */
|
|
|
|
if (next_object) {
|
|
object = next_object;
|
|
next_object = NULL;
|
|
} else if (state_list) {
|
|
state = acpi_ut_pop_generic_state(&state_list);
|
|
object = state->update.object;
|
|
acpi_ut_delete_generic_state(state);
|
|
}
|
|
}
|
|
|
|
return (AE_OK);
|
|
|
|
error_exit:
|
|
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not update object reference count"));
|
|
|
|
/* Free any stacked Update State objects */
|
|
|
|
while (state_list) {
|
|
state = acpi_ut_pop_generic_state(&state_list);
|
|
acpi_ut_delete_generic_state(state);
|
|
}
|
|
|
|
return (status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_add_reference
|
|
*
|
|
* PARAMETERS: object - Object whose reference count is to be
|
|
* incremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Add one reference to an ACPI object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ut_add_reference(union acpi_operand_object *object)
|
|
{
|
|
|
|
ACPI_FUNCTION_NAME(ut_add_reference);
|
|
|
|
/* Ensure that we have a valid object */
|
|
|
|
if (!acpi_ut_valid_internal_object(object)) {
|
|
return;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
|
|
"Obj %p Current Refs=%X [To Be Incremented]\n",
|
|
object, object->common.reference_count));
|
|
|
|
/* Increment the reference count */
|
|
|
|
(void)acpi_ut_update_object_reference(object, REF_INCREMENT);
|
|
return;
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ut_remove_reference
|
|
*
|
|
* PARAMETERS: object - Object whose ref count will be decremented
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Decrement the reference count of an ACPI internal object
|
|
*
|
|
******************************************************************************/
|
|
|
|
void acpi_ut_remove_reference(union acpi_operand_object *object)
|
|
{
|
|
|
|
ACPI_FUNCTION_NAME(ut_remove_reference);
|
|
|
|
/*
|
|
* Allow a NULL pointer to be passed in, just ignore it. This saves
|
|
* each caller from having to check. Also, ignore NS nodes.
|
|
*/
|
|
if (!object ||
|
|
(ACPI_GET_DESCRIPTOR_TYPE(object) == ACPI_DESC_TYPE_NAMED)) {
|
|
return;
|
|
}
|
|
|
|
/* Ensure that we have a valid object */
|
|
|
|
if (!acpi_ut_valid_internal_object(object)) {
|
|
return;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_ALLOCATIONS,
|
|
"Obj %p Current Refs=%X [To Be Decremented]\n",
|
|
object, object->common.reference_count));
|
|
|
|
/*
|
|
* Decrement the reference count, and only actually delete the object
|
|
* if the reference count becomes 0. (Must also decrement the ref count
|
|
* of all subobjects!)
|
|
*/
|
|
(void)acpi_ut_update_object_reference(object, REF_DECREMENT);
|
|
return;
|
|
}
|